PSTAX vs. MERFX

Last updated Jun 4, 2026

PSTAX (Virtus KAR Capital Growth Fund) and MERFX (The Merger Fund) are both mutual funds - PSTAX is a Large Cap Growth Equities fund managed by Virtus, while MERFX is a Event Driven fund managed by Virtus. Over the past 10 years, PSTAX returned 13.73%/yr vs 3.89%/yr for MERFX. At a 0.44 correlation, their price movements are largely independent. PSTAX charges 1.20%/yr vs 1.50%/yr for MERFX.

Performance

PSTAX vs. MERFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Virtus KAR Capital Growth Fund (PSTAX) and The Merger Fund (MERFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PSTAX achieves a 7.63% return, which is significantly higher than MERFX's 0.99% return. Over the past 10 years, PSTAX has outperformed MERFX with an annualized return of 13.73%, while MERFX has yielded a comparatively lower 3.89% annualized return.

PSTAX

• 1D: -0.28%
• 1M: 11.00%
• YTD: 7.63%
• 6M: 5.82%
• 1Y: 10.30%
• 3Y*: 17.97%
• 5Y*: 7.04%
• 10Y*: 13.73%

MERFX

• 1D: 0.00%
• 1M: 0.23%
• YTD: 0.99%
• 6M: 1.26%
• 1Y: 4.60%
• 3Y*: 6.03%
• 5Y*: 2.86%
• 10Y*: 3.89%

*Multi-year figures are annualized to reflect compound growth (CAGR)

PSTAX vs. MERFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PSTAX Virtus KAR Capital Growth Fund	7.63%	6.85%	25.19%	34.35%	-35.74%	11.70%	46.13%	42.83%	-8.07%	35.13%
MERFX The Merger Fund	0.99%	8.11%	3.27%	4.17%	0.71%	-0.19%	4.87%	5.96%	7.68%	2.39%

Correlation

The correlation between PSTAX and MERFX is 0.28, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.28
Correlation (3Y) Calculated over the trailing 3-year period	0.27
Correlation (5Y) Calculated over the trailing 5-year period	0.33
Correlation (10Y) Calculated over the trailing 10-year period	0.34
Correlation (All Time) Calculated using the full available price history since Jan 3, 1996	0.44

The correlation between PSTAX and MERFX shifts across timeframes, from 0.27 (3 years) to 0.44 (all time), reflecting how their relationship changes across market environments.

Return for Risk

PSTAX vs. MERFX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

PSTAX

PSTAX Risk / Return Rank: 7
PSTAX Sharpe Ratio Rank: 8
PSTAX Sortino Ratio Rank: 8
PSTAX Omega Ratio Rank: 8
PSTAX Calmar Ratio Rank: 6
PSTAX Martin Ratio Rank: 6

MERFX

MERFX Risk / Return Rank: 97
MERFX Sharpe Ratio Rank: 94
MERFX Sortino Ratio Rank: 98
MERFX Omega Ratio Rank: 95
MERFX Calmar Ratio Rank: 98
MERFX Martin Ratio Rank: 99

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

PSTAX vs. MERFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Virtus KAR Capital Growth Fund (PSTAX) and The Merger Fund (MERFX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	PSTAX	MERFX	Difference
Sharpe ratio: Return per unit of total volatility	0.64	3.31	-2.67
Sortino ratio: Return per unit of downside risk	1.00	6.16	-5.16
Omega ratio: Gain probability vs. loss probability	1.12	1.78	-0.66
Calmar ratio: Return relative to maximum drawdown	0.55	9.13	-8.58
Martin ratio: Return relative to average drawdown	1.72	42.15	-40.43
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PSTAX vs. MERFX - Sharpe Ratio Comparison

The current PSTAX Sharpe Ratio is 0.64, which is lower than the MERFX Sharpe Ratio of 3.31. The chart below compares the historical Sharpe Ratios of PSTAX and MERFX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	PSTAX	MERFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.64	3.31	-2.67
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.28	0.84	-0.55
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.58	1.04	-0.46
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	0.68	-0.34

Drawdowns

PSTAX vs. MERFX - Drawdown Comparison

The maximum PSTAX drawdown since its inception was -76.37%, which is greater than MERFX's maximum drawdown of -20.82%. Use the drawdown chart below to compare losses from any high point for PSTAX and MERFX.

Drawdown Indicators

	PSTAX	MERFX	Difference
Max Drawdown Largest peak-to-trough decline	-76.37%	-20.82%	-55.55%
Max Drawdown (1Y) Largest decline over 1 year	-19.58%	-0.52%	-19.06%
Max Drawdown (3Y) Largest decline over 3 years	-29.63%	-3.36%	-26.27%
Max Drawdown (5Y) Largest decline over 5 years	-44.54%	-5.95%	-38.59%
Max Drawdown (10Y) Largest decline over 10 years	-44.54%	-9.35%	-35.19%
Current Drawdown Current decline from peak	-3.53%	-0.11%	-3.42%
Average Drawdown Average peak-to-trough decline	-31.92%	-2.67%	-29.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.25%	0.11%	+6.14%

Volatility

PSTAX vs. MERFX - Volatility Comparison

Virtus KAR Capital Growth Fund (PSTAX) has a higher volatility of 5.47% compared to The Merger Fund (MERFX) at 0.38%. This indicates that PSTAX's price experiences larger fluctuations and is considered to be riskier than MERFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PSTAX	MERFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.47%	0.38%	+5.09%
Volatility (6M) Calculated over the trailing 6-month period	13.60%	0.92%	+12.68%
Volatility (1Y) Calculated over the trailing 1-year period	16.84%	1.43%	+15.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	25.19%	3.44%	+21.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.66%	3.75%	+19.91%

PSTAX vs. MERFX - Expense Ratio Comparison

PSTAX has a 1.20% expense ratio, which is lower than MERFX's 1.50% expense ratio.

Dividends

PSTAX vs. MERFX - Dividend Comparison

PSTAX's dividend yield for the trailing twelve months is around 7.04%, less than MERFX's 7.34% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MERFX The Merger Fund	7.34%	7.42%	3.24%	2.59%	3.50%	0.27%	3.31%	1.34%	4.52%	0.59%	0.32%	1.25%
PSTAX Virtus KAR Capital Growth Fund	7.04%	7.58%	14.19%	6.07%	23.19%	7.73%	3.15%	2.71%	11.57%	6.28%	8.98%	4.59%

Frequently Asked Questions

Can I hold both PSTAX and MERFX in my portfolio?

PSTAX and MERFX have a correlation of 0.28, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PSTAX or MERFX?

PSTAX has higher volatility (5.47%) compared to MERFX (0.38%). In terms of maximum drawdown, PSTAX dropped -76.37% vs MERFX's -20.82%.

Which has better risk-adjusted returns?

MERFX currently has the higher Sharpe Ratio (3.31 vs 0.64), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.